Rear gun sight



33-259 199229302 SR 3 am) Aug. 15, 1933. w KlNG 1,922,302

REAR GUN SIGHT Filed April 27, 1929 INVENTOR. 05.4 VV. /'f

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Patented Aug. 15, 1933 FFICE REAR GUN SIGHT Dean W. King, San Francisco, Calif.

Application April 27, 1929. Serial No. 358,672

1 Claim.

My invention relates to improvements in rear gun sights and it consists in-the combinations, constructions and arrangements hereinafter described and claimed.

An object of my invention is to provide a rear gun sight that is adjustable and makes use of a spring base for holding the sight in adjusted position.

The shape of the notch or sighting disc is made concave so as to conform with the general outline of the rear of sight. The sighting disc is locked in place by a set screw and the latter bears against a blank disc and presses this blank disc against the sighting disc. The use of the blank disc prevents the marring of the sighting disc. Numbers are associated with the adjustment of the sight for indicating distances, such as, 1 indicates one hundred yards, 2, two hundred yards, etc.

A further object of my invention is to provide a device of the type described, which is extremely simple in construction and which is durable and eflicient for the purposes intended.

Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed out in the appended claim.

My invention is illustrated in the accompanying drawing forming a part of this application, in which Figure 1 is a top plan view of the device;

Figure 2 is a side elevation;

Figure 3 is a section through a part of the device;

Figures 4, 5 and 6 are views of different parts of the device; and

Figure 7 is a transverse section through the device.

In carrying out my invention, I provide a base 1 made of spring metal and of the shape shown in Figures 1 and 2. The base has a wedged-shaped projection 2 (see Figure 2) that fits into a dovetail slot 3 in a gun barrel 4. The front end of the base is provided with a pointer 5 and the rear end has an upwardly and rearwardly-extending portion 6. Figure 2 clearly shows how the base is tapered so as to be thicker at the projection 2 and more narrow at the base of the portion 6. The rear surface of the portion 6 has a dull finish.

The shape of the portion 6, upon looking at it from the rear, is that as shown in Figure 7. The portion 6 has a recess 7 used in sighting. Between the bottom of the recess '7 and the bottom of the portion 6, I dispose two vertical guideways 8, (see Figures 3 and 7). These guideways receive a sighting disc 9 and a blank disc 10 of the shapes shown in Figures 4 and 5. The guideways 8 are just big enough to receive these discs, as shown in Figure 3.

The portion 6 carries a set screw 11 and this bears against the disc 10 and clamps this disc and the disc in place. It should be noted that the screw enters from the inner face of the portion 6. The blank disc 10 is used for the purpose of preventing the screw 11 from marring the sighting disc 9.

It will be seen from Figure 4 that the sighting disc 9 is star-shaped and has a white diamond-shaped face 11'. The corners of the diamond are disposed adjacent to notches 12 and the latter are of different shapes in order to permit the device to be used for different types of sighting. The disc 9 may be turned into the desired position before insertion into the grooves 8. The blank disc 10 is provided with a concave portion 13 that lies below the uppermost notch 12 for permitting a true sight to be taken. Both have dull finished surfaces. The blank disc 10 may be provided with a U-shaped white portion 10 of the shape shown in Figure 5, and the disc may be interchanged with the disc 9. The concave portion 13 has a sighting notch 13. The U-shaped white portion makes the sight notch stand out and clearly defines the latter so that it is easy for one to center the front sight (not shown) with respect to the notch.

The sight is raised or lowered by moving an elevator 14 (see Figure 6). The elevator has a roughened gripping portion 15 and a U-shaped portion, the latter receiving a part of the base 1.

The forward end 16 is chamfered from the dotted line 17 to form a screw driver that can be used in adjusting the screw 11. The U- shaped portion has upwardly-extending triangularly-shaped sides 18, whose upper edges are serrated as at 19. I have shown four notches but it is obvious that this number may be changed at will without departing from the spirit and scope of my invention.

The sides of the portion 6 have teeth 20 formed therein, (see Figure 2). These teeth ride in the serrations 19 when the elevator 14 is moved rearwardly. It will be seen that a rearward movement of the elevator will raise the sight. The top surface of the elevator has indicating marks 21 thereon. These marks are exposed as the elevator is moved rearwardly and they indicate a number of yards of firing range.

For example, when the device is in the position shown in Figures 1 and 2, the number 1 is exposed. An advancement of the elevator notch will expose the number 2. This will indicate a range of two hundred yards. In like manner, the range can be increased up to five hundred yards. These numbers may indicate other yardage if desired.

The purpose of the spring base tapering from a thick portion to a thin portion is to keep the portion 6 down upon the sides 18. It should be noted that the edges of the sighting disc 9 are slightly concaved in order to conform with the concaved edge of the recess 7, (see Figures 4 and '7). The device may be quickly secured to the gun barrel and is not likely to get out of order easily.

Although I have shown and described one embodiment of my invention, it is to be understood that the same is susceptible of various changes, and I reserve the right to employ such changes as may come within the scope of the appended claim.

I claim:

In a rear gun sight, an upwardly-extending member having a substantially circular recess, a sighting disc disposed below the bottom of the recess and having its upper edge substantially conforming to the curvature of the recess, a screw for securing the sighting disc in place and a protecting disc disposed between the screw and the sighting disc, said protecting disc having a concaved upper edge for exposing the top of the sighting disc.

DEAN W. KING. 

